Brand Names: Canada

What is this drug used for?

What do I need to tell my doctor BEFORE I take this drug?

If you have an allergy to naltrexone or any other part of this drug.

If you are allergic to any drugs like this one, any other drugs, foods, or other substances. Tell your doctor about the allergy and what signs you had, like rash; hives; itching; shortness of breath; wheezing; cough; swelling of face, lips, tongue, or throat; or any other signs.

If you are taking an opioid drug like morphine or oxycodone, are addicted to an opioid drug, or are having withdrawal signs.

If you have taken a pain drug within the past 7 to 10 days.

If you are breast-feeding or plan to breast-feed.

This is not a list of all drugs or health problems that interact with this drug.

Tell your doctor and pharmacist about all of your drugs (prescription or OTC, natural products, vitamins) and health problems. You must check to make sure that it is safe for you to take this drug with all of your drugs and health problems. Do not start, stop, or change the dose of any drug without checking with your doctor.

What are some things I need to know or do while I take this drug?

All products:

Tell all of your health care providers that you take this drug. This includes your doctors, nurses, pharmacists, and dentists.

Avoid driving and doing other tasks or actions that call for you to be alert until you see how this drug affects you.

Have blood work checked as you have been told by the doctor. Talk with the doctor.

This drug may affect certain lab tests. Tell all of your health care providers and lab workers that you take this drug.

Avoid drinking alcohol while taking this drug.

Do not take pain drugs while you are taking this drug. Pain drugs will not work. Do not take more pain drugs to try to get them to work. Doing this may cause very bad injury, coma, or death. Talk with your doctor.

People taking this drug to keep a drug-free state may get more effects from pain drugs when this drug is stopped. Even low doses of pain drugs may cause very bad and sometimes deadly effects in these people. Talk with your doctor.

If you are addicted to pain drugs and are given this drug, you may have signs of withdrawal. Talk with your doctor.

Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using this drug while you are pregnant.

Tablets:

Have patient safety card with you at all times.

Injection:

A type of lung infection caused by an allergic reaction has happened with this drug. If this happens, you may need to be treated in a hospital. Talk with your doctor.

What are some side effects that I need to call my doctor about right away?

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

All products:

Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing, swallowing, or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.

Signs of low mood (depression), thoughts of killing yourself, nervousness, emotional ups and downs, thinking that is not normal, anxiety, or lack of interest in life.

Very bad dizziness or passing out.

Very bad headache.

Feeling confused.

Trouble breathing, slow breathing, or shallow breathing.

Feeling very sleepy.

Sex problems in men.

Injection:

Signs of lung or breathing problems like shortness of breath or other trouble breathing, cough, or fever.

Area that feels hard, blisters, dark scab, lumps, open wound, pain, swelling, or other very bad skin irritation where the shot was given.

What are some other side effects of this drug?

All drugs may cause side effects. However, many people have no side effects or only have minor side effects. Call your doctor or get medical help if any of these side effects or any other side effects bother you or do not go away:

All products:

Feeling nervous and excitable.

Anxiety.

Headache.

Belly pain.

Cramps.

Constipation.

Loose stools (diarrhea).

More thirst.

Not able to sleep.

Upset stomach or throwing up.

Dizziness.

Feeling sleepy.

Muscle or joint pain.

Not hungry.

Feeling tired or weak.

Injection:

Irritation where the shot is given.

Nose or throat irritation.

Dry mouth.

Back pain.

These are not all of the side effects that may occur. If you have questions about side effects, call your doctor. Call your doctor for medical advice about side effects.

You may report side effects to your national health agency.

How is this drug best taken?

Use this drug as ordered by your doctor. Read all information given to you. Follow all instructions closely.

Tablets:

To gain the most benefit, do not miss doses.

Keep taking this drug as you have been told by your doctor or other health care provider, even if you feel well.

Injection:

It is given as a shot into a muscle.

What do I do if I miss a dose?

Tablets:

Take a missed dose as soon as you think about it.

If it is close to the time for your next dose, skip the missed dose and go back to your normal time.

Do not take 2 doses at the same time or extra doses.

Injection:

Call your doctor to find out what to do.

How do I store and/or throw out this drug?

Tablets:

Store at room temperature.

Store in a dry place. Do not store in a bathroom.

Injection:

If you need to store this drug at home, talk with your doctor, nurse, or pharmacist about how to store it.

All products:

Keep all drugs in a safe place. Keep all drugs out of the reach of children and pets.

Throw away unused or expired drugs. Do not flush down a toilet or pour down a drain unless you are told to do so. Check with your pharmacist if you have questions about the best way to throw out drugs. There may be drug take-back programs in your area.

General drug facts

If your symptoms or health problems do not get better or if they become worse, call your doctor.

Do not share your drugs with others and do not take anyone else’s drugs.

Keep a list of all your drugs (prescription, natural products, vitamins, OTC) with you. Give this list to your doctor.

Talk with the doctor before starting any new drug, including prescription or OTC, natural products, or vitamins.

Some drugs may have another patient information leaflet. If you have any questions about this drug, please talk with your doctor, nurse, pharmacist, or other health care provider.

If you think there has been an overdose, call your poison control center or get medical care right away. Be ready to tell or show what was taken, how much, and when it happened.

Consumer Information Use and Disclaimer

This information should not be used to decide whether or not to take this medicine or any other medicine. Only the healthcare provider has the knowledge and training to decide which medicines are right for a specific patient. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from the healthcare provider. You must talk with the healthcare provider for complete information about the risks and benefits of using this medicine.

Last Reviewed Date

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If you have any questions or concerns, contact a member of your healthcare team directly or call 212-639-2000 for help.

If you have any questions or concerns, talk with a member of your healthcare team. You can reach them Monday through Friday from 9:00 am to 5:00 pm at ____________________. After 5:00 pm, during the weekend, and on holidays, please call____________________. If there’s no number listed, or you’re not sure, call 212-639-2000.